A'gan, a high school senior with no expectations for the future and a carefree attitude toward everything, finds himself suddenly under strict supervision when his father, who has been away for a long time, returns home. An accident, along with a "mutual assistance agreement" between his father and Lin Xin'er, A'gan's crush, inadvertently leads to his father becoming A'gan's deskmate. This triggers a string of comical and heartwarming moments as both father and son gain new insights into love and life.
In the vast universe, there is a planet called "Fantasy Domain" on which an ancient intelligent species lives. This race is highly civilized and kind-hearted. It sends tribesmen to and from other planets in the universe. They are dedicated to the people on all planets but have a long-lasting obsession. On earth, they are called "Zhu Nian Masters."